Re: [patch 0/3] AHCI Link Power Management

[Jeff Garzik <jeff@garzik.org>]

Tejun Heo wrote:
> Kristen Carlson Accardi wrote:
> > Hi,
> > This series of patches enables Aggressive Link Power Management for AHCI 
> > devices, as documented in the AHCI spec.  On my laptop (a Lenovo X60), this
> > saves me a full watt of power.  On other systems, reported power savings
> > range from .5-1.5 Watts.  It has been tested by the kind folks at #powertop
> > with similar results.  Please give it a try and let me know what you think.
>
> I'm not sure about this.  We need better PM framework to support
> powersaving in other controllers and some ahcis don't save much when
> only link power management is used, they need to be turned off

A better PM framework would definitely be nice :)


> completely && I don't think scsi sysfs is the right place to export this
> interface.

That's about the only place we have right now.

	Jeff



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